天空辐射过冷CO_(2)制冷系统性能分析  

Performance Analysis of Radiative Sky Subcooling CO_(2)Refrigeration System

作　　者：代宝民 张佳宁 曹羽 陈亚菲 刘圣春[1] 赵霖 王越 肖鹏 DAI Baomin;ZHANG Jianing;CAO Yu;CHEN Yafei;LIU Shengchun;ZHAO Lin;WANG Yue;XIAO Peng(Tianjin Key Laboratory of Refrigeration Technology,School of Mechanical Engineering,Tianjin Commercial University,Tianjin 300134,China;Tianjin Danhua Hongye Refrigeration Technology,Tianjin 300131,China)

机构地区：[1]天津市制冷技术重点实验室,天津商业大学机械工程学院,天津300134 [2]天津市丹华宏业制冷技术有限公司,天津300131

出　　处：《工程热物理学报》2024年第11期3227-3232,共6页Journal of Engineering Thermophysics

基　　金：国家重点研发计划项目(No.2021YFE0116100);国家自然科学基金(No.51806151);天津市自然科学基金(No.20JCQNJC00600)。

摘　　要：为解决CO_(2)制冷系统性能偏低的问题,基于天空辐射冷却技术,提出了天空辐射过冷CO_(2)制冷系统。建立其数学模型,并对其应用于北京某商超冷冻冷藏系统的典型日、典型周以及全年性能进行分析。结果表明与基础CO_(2)制冷系统相比,采用天空辐射过冷技术可提升系统性能系数(COP),降低CO_(2)制冷系统排气压力。COP提升率受环境温度和太阳辐射强度的综合影响,夏季COP提升率最高,平均为39.33%,秋季COP提升率最低,平均为8.48%。天空辐射过冷技术对系统全年运行性能均有所提升,全年COP提升率为11.68%~49.55%,平均提升率为25.55%。本文为CO_(2)制冷系统的性能提升提供了理论参考。To overcome the disadvantage of relatively low performance of CO_(2)refrigeration system,based on sky radiation cooling technology,the radiative sky subcooling CO_(2)refrigeration system is proposed.The mathematical model is established,and the typical daily,weekly and annual performance of the refrigeration system for frozen and cooling storage used in a supermarket located in Beijing is analyzed.The results show that compared with the baseline CO_(2)refrigeration system,the adoption of radiative sky subcooling technology can improve the coefficient of performance(COP)and reduce the discharge pressure of the CO_(2)refrigeration system.The COP improvement ratio is simultaneously related to the ambient temperature and solar radiation intensity.The COP improvement ratio is highest in summer,with an average of 39.33%,and lowest in autumn,with an average of 8.48%.The radiative sky subcooled technology can improve the operating performance of the system throughout the year,and the annual COP improvement ratio is 11.68%∼49.55%,and the average improvement ratio is 25.55%.This study can provide a theoretical reference to improve the performance of CO_(2)refrigeration system.

关 键 词：天空辐射过冷 被动冷却 CO_(2)制冷系统 商超冷冻冷藏 性能分析 

分 类 号：TB611[一般工业技术—制冷工程]